[PATCH v4 13/18] rtla: Use str_has_prefix() for option prefix check

[Wander Lairson Costa <wander@redhat.com>]

The argument parsing code in timerlat_main() and osnoise_main() uses
strncmp() with a length of 1 to check if the first argument starts
with a dash, indicating an option flag was passed.

Replace this pattern with str_has_prefix() for consistency with the
rest of the codebase. While character comparison would be slightly
more efficient, using str_has_prefix() provides better readability
and maintains a uniform coding style throughout the rtla tool.

Signed-off-by: Wander Lairson Costa <wander@redhat.com>
---
 tools/tracing/rtla/src/osnoise.c  | 2 +-
 tools/tracing/rtla/src/timerlat.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/tracing/rtla/src/osnoise.c b/tools/tracing/rtla/src/osnoise.c
index 9d1fd9981fe91..2db3db155c44a 100644
--- a/tools/tracing/rtla/src/osnoise.c
+++ b/tools/tracing/rtla/src/osnoise.c
@@ -1210,7 +1210,7 @@ int osnoise_main(int argc, char *argv[])
 
 	if ((strcmp(argv[1], "-h") == 0) || (strcmp(argv[1], "--help") == 0)) {
 		osnoise_usage(0);
-	} else if (strncmp(argv[1], "-", 1) == 0) {
+	} else if (str_has_prefix(argv[1], "-")) {
 		/* the user skipped the tool, call the default one */
 		run_tool(&osnoise_top_ops, argc, argv);
 		exit(0);
diff --git a/tools/tracing/rtla/src/timerlat.c b/tools/tracing/rtla/src/timerlat.c
index 8f8811f7a13bd..84577daadd668 100644
--- a/tools/tracing/rtla/src/timerlat.c
+++ b/tools/tracing/rtla/src/timerlat.c
@@ -272,7 +272,7 @@ int timerlat_main(int argc, char *argv[])
 
 	if ((strcmp(argv[1], "-h") == 0) || (strcmp(argv[1], "--help") == 0)) {
 		timerlat_usage(0);
-	} else if (strncmp(argv[1], "-", 1) == 0) {
+	} else if (str_has_prefix(argv[1], "-")) {
 		/* the user skipped the tool, call the default one */
 		run_tool(&timerlat_top_ops, argc, argv);
 		exit(0);
-- 
2.53.0